Ownership implies at the least a degree of control, the US definitely doesn't control content across the entire globe, and even domestically it's a lot worse at it than the PROC (the very fact that the PROC is very good at content control pretty much mean that the US definitely does not "own" the internet).

.....I mean what I said yes the gov dosen't police it but it owns the god damn internet if you research the case over CNN it says that the US has a strong grip over the internet and problay could shut it down if they wished